RISER TENSIONER HAVING AN EMERGENCY SEAL,申请号US201113188282-传众专利搜索

RISER TENSIONER HAVING AN EMERGENCY SEAL

申请公布号：US2013022409(A1)

申请号：US201113188282

申请日期：2011.07.21

申请公布日期：2013.01.24

申请人：

YUON TAE SAM

发明人：YUON TAE SAM

分类号：E21B17/01

主分类号：E21B17/01

摘要：A riser tensioner has an emergency seal and tensions a riser extending to the seabed from a drilling ship which drills for submarine resources such as oil. The riser tensioner is disposed under a drilling ship to tension a riser used for drilling operation of submarine resources and including a plurality of cylinders into which oil is supplied. The riser tensioner further includes a piston rod partially inserted into each of the cylinders and reciprocating within the cylinder, a piston seal disposed between a head of the piston rod and a wall of the cylinder to provide fluid sealing therebetween; an oil leakage detector detecting oil leakage through the piston seal, and an emergency seal disposed in a groove formed at an upper portion of the head of the piston rod to be compressed towards the wall of the cylinder and protrude from the head of the piston rod to prevent oil leakage through the wall of the cylinder when the oil leakage detector detects oil leakage.